News tagged with electrical signal

Cochlea model reveals inner workings of the ear

PhD student Mohammad Ayat's research involved developing a model of the cochlea, a snail-shaped chamber in the human ear, focused on the cochlear microphonic (CM)—an electrical signal generated inside the cochlea in response ...

May 13, 2015
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Smart microchips may optimise human vision

To date, chip-based retinal implants have only permitted a rudimentary restoration of vision. However, modifying the electrical signals emitted by the implants could change that. This is the conclusion of ...

May 11, 2015
popularity 20 comments 0

New genetic clues found in fragile X syndrome

Scientists have gained new insight into fragile X syndrome—the most common cause of inherited intellectual disability—by studying the case of a person without the disorder, but with two of its classic ...

Jan 16, 2015
popularity 139 comments 0

Study reveals novel role for the Pin1 molecule

Synapses are "dynamic" things: they can regulate their action in neural processes related to learning, for example, but also as a consequence of diseases. A research team – led by SISSA – has demonstrated ...

Oct 10, 2014
popularity 0 comments 0

Signal (electronics)

In the fields of communications, signal processing, and in electrical engineering more generally, a signal is any time-varying or spatial-varying quantity.

In the physical world, any quantity measurable through time or over space can be taken as a signal. Within a complex society, any set of human information or machine data can also be taken as a signal. Such information or machine data (for example, the dots on a screen, the ink making up text on a paper page, or the words now flowing into the reader's mind) must all be part of systems existing in the physical world – either living or non-living.

Despite the complexity of such systems, their outputs and inputs can often be represented as simple quantities measurable through time or across space. In the latter half of the 20th century, electrical engineering itself separated into several disciplines, specializing in the design and analysis of physical signals and systems, on the one hand, and in the functional behavior and conceptual structure of the complex human and machine systems, on the other. These engineering disciplines have led the way in the design, study, and implementation of systems that take advantage of signals as simple measurable quantities in order to facilitate the transmission, storage, and manipulation of information.

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